Panic - Kern Exec 3

[ganeshs87]

Hi ,
I am getting kern exec 3 panic in d following code .Can anyone please help me resolving the code ?

IN DB AppUi.cpp


void CDBAppUi::AddStudentL(const TDesC& name,const TDesC& id,const TInt date,const TInt month,const TInt year,
const TDesC& gender,const TDesC& age,const TDesC& father,const TDesC& course,const TDesC& sem,const TDesC& branch,const TDesC& school,const TDesC& address,const TDesC& university,const TDesC& mobile)
{

_LIT(KErrorMsg,"Failed. Make sure the fields are not empty.");
TInt err(KErrNone);
err = StudentDb->insert_student(name,id,date,month,year,gender,age,father,course,sem,branch,school,address,university,mobile);
//HERE S WHERE I AM GETTING THE PANIC

if(err)
ShowNoteL(KErrorMsg);
// else
// ShowAllStudentsL();
}

In DBEngine.CPP :-

TBool CStudentDb::insert_student(const TDesC& name,const TDesC& id,const TInt date,const TInt month,const TInt year,
const TDesC& gender,const TDesC& age,const TDesC& father,const TDesC& course,const TDesC& sem,const TDesC& branch,const TDesC& school,const TDesC& address,const TDesC& university,const TDesC& mobile )
{
_LIT(KSelect, "SELECT ");
_LIT(KFrom, " FROM ");
_LIT(KOrderBy, " ORDER BY ");
_LIT(KDot, ", ");


TBuf<KCustomSqlMaxLength> sqlStr;

sqlStr.Append(KSelect);
sqlStr.Append(name);
sqlStr.Append(KDot);
sqlStr.Append(id);
sqlStr.Append(KDot);
sqlStr.Append(date);
sqlStr.Append(KDot);
sqlStr.Append(month);
sqlStr.Append(KDot);
sqlStr.Append(year);
sqlStr.Append(KDot);
sqlStr.Append(gender);
sqlStr.Append(KDot);
sqlStr.Append(age);
sqlStr.Append(KDot);
sqlStr.Append(father);
sqlStr.Append(KDot);
sqlStr.Append(course);
sqlStr.Append(KDot);
sqlStr.Append(sem);
sqlStr.Append(KDot);
sqlStr.Append(branch);
sqlStr.Append(KDot);
sqlStr.Append(school);
sqlStr.Append(KDot);
sqlStr.Append(address);
sqlStr.Append(KDot);
sqlStr.Append(university);
sqlStr.Append(KDot);
sqlStr.Append(mobile);
sqlStr.Append(KFrom);
sqlStr.Append(KStudentsTable);
sqlStr.Append(KOrderBy);
sqlStr.Append(name);
sqlStr.Append(KDot);
sqlStr.Append(KStudentsSchoolCol);


RDbView view;
TInt error;
error = view.Prepare(iStudentDb, TDbQuery(sqlStr, EDbCompareFolded));
if(error!=KErrNone)
{
return error;
}
error = view.EvaluateAll();
if(error!=KErrNone)
{
return error;
}
RDbColWriteStream writeStream;

TRAP(error,
view.InsertL();
view.SetColL(1,name);
view.SetColL(2,id );
view.SetColL(3,date);
view.SetColL(4,month);
view.SetColL(5,year);
writeStream.OpenL(view,6);
writeStream.WriteL(gender);

writeStream.OpenL(view, 7);
writeStream.WriteL(age);

writeStream.OpenL(view, 8);
writeStream.WriteL(father);

writeStream.OpenL(view, 9);
writeStream.WriteL(father);

writeStream.OpenL(view, 10);
writeStream.WriteL(course);

writeStream.OpenL(view, 11);
writeStream.WriteL(sem);

writeStream.OpenL(view, 12);
writeStream.WriteL(course);

writeStream.OpenL(view, 13);
writeStream.WriteL(school);

writeStream.OpenL(view, 14);
writeStream.WriteL(course);

);
if(error!=KErrNone)
{
return error;
}
writeStream.Close();
TRAP(error, view.PutL());
if(error!=KErrNone)
{
return error;
}
view.Close();
return KErrNone;

return ETrue;

}

Please help me to resolve this panic.

Thanking you,
Ganesh

[mdzahidul_haque]

Hi Ganesh,

see in the ShowNoteL(KErrorMsg),what exactly u r doing there. Debug into the method,
Kern Exec3 , u must be trying to access the variable which u have not created not must be trying to access the deletable data.

if possible share the code

[mahbub_s60]

Hi,
You can check insert_student and see if you are writing data (Descriptor) out of range or some memory that has not been allocating and using it.

[mdzahidul_haque]

Hi,

chk whether the instance of RBdNamedDatabase iStudentDb has been instantiated or not.

[ganeshs87]

Hi,
I can share my code. Can u please give me your mail id ? I ll mail you the code .

[mdzahidul_haque]

i have send u the mail id...

[ganeshs87]

I have sent you the code . Please check and let me know where should i make the corrections . Thank you for your time and help .

[mdzahidul_haque]

let me chk...

[mdzahidul_haque]

where are u creating the instance of StudentDb;I think u have forgot to call yur OpenDatabaseL() method.

call yur OpenDatabaseL() method from the constructL(), it will solve yur prob.
and better that u mentain the array of structure, instead of passing so many arguments.
Calling each and every time yur insert_student method will decrease the performance.

[joy.mca]

Either you are accessing a null pointer to call some function or your stack size should be increased to remove that error.

Thanks